 In 2003, Tacit introduced ActiveNet, a browser-based version of KnowledgeMail.In 2003–2004, several companies trialed ActiveNet and Tacit’s underlying technologies, including GlaxoSmithKline, Northrop Grumman and Lockheed Martin.Lockheed Martin, for example, piloted Tacit over five other expertise location vendors and later rolled the product out in its Space Systems Division.